Snapchat co-founder and Chief Executive Evan Spiegel signed off on the funding in a filing with the Securities and Exchange Commission on Wednesday. The filing was light on details, with Snapchat declining to list its revenue range or name its investor.

With the latest round, the popular photo-messaging app has now raised more than $120 million. The rapidly growing start-up enables users to pre-set expiration times on their photos so that the images disappear after a few seconds.

Snapchat has been busy recently. Last week it announced that it had hired Emily White away from Instagram to be its new chief operating officer. That came on the heels of its rejection of Facebook's hefty buyout offer. And the start-up also outgrew its Venice boardwalk headquarters, relocating to 63 Market St.